What is the CVSS score of CVE-2026-1420?

CVE-2026-1420 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Ac23 Firmware are affected by CVE-2026-1420?

A high-severity vulnerability (CVE-2026-1420) affecting Tenda AC23 wireless routers has been publicly disclosed with working exploits available, but no patch currently exists.

Is there a public PoC exploit available for CVE-2026-1420?

Yes, a public proof-of-concept exploit is available for CVE-2026-1420. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-1420?

Within 24 hours: Identify and inventory all Tenda AC23 devices running firmware 16.03.07.52 across the organization; restrict administrative access to affected devices to trusted networks only. Within 7 days: Implement network segmentation to isolate affected routers from critical systems; enable enhanced monitoring and logging on these devices; evaluate replacement equipment from alternative vendors. Within 30 days: Complete migration away from vulnerable Tenda AC23 units or apply any available security updates from Tenda if released; conduct network assessment for signs of prior exploitation.

Ac23 Firmware CVE-2026-1420

HIGH

Buffer Overflow (CWE-119)

2026-01-26 cna@vuldb.com

Buffer Overflow Ac23 Firmware

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:00 vuln.today

PoC Detected

Jan 28, 2026 - 14:44 vuln.today

Public exploit code

CVE Published

Jan 26, 2026 - 06:16 nvd

HIGH 8.8

DescriptionCVE.org

A flaw has been found in Tenda AC23 16.03.07.52. This impacts an unknown function of the file /goform/WifiExtraSet. This manipulation of the argument wpapsk_crypto causes buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.

AnalysisAI

Unauthenticated attackers can trigger a buffer overflow in Tenda AC23 firmware version 16.03.07.52 through the wpapsk_crypto parameter in /goform/WifiExtraSet, enabling remote code execution with full system compromise. Public exploit code is available and actively used in the wild, yet no patch has been released by the vendor. All AC23 devices running the affected firmware version are at immediate risk of complete takeover.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects Ac23 Firmware. A flaw has been found in Tenda AC23 16.03.07.52. This impacts an unknown function of the file /goform/WifiExtraSet. This manipulation of the argument wpapsk_crypto causes buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.